US3477480A - Stabilized cutting tip for chain saw cutter link - Google Patents
Stabilized cutting tip for chain saw cutter link Download PDFInfo
- Publication number
- US3477480A US3477480A US701936A US3477480DA US3477480A US 3477480 A US3477480 A US 3477480A US 701936 A US701936 A US 701936A US 3477480D A US3477480D A US 3477480DA US 3477480 A US3477480 A US 3477480A
- Authority
- US
- United States
- Prior art keywords
- base plate
- cutting
- carbide
- slot
- tip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
- B27B33/14—Saw chains
- B27B33/142—Cutter elements
- B27B33/144—Cutter elements having cutting inserts or exchangeable cutting teeth
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/26—Cutters, for shaping comprising cutting edge bonded to tool shank
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/909—Cutter assemblage or cutter element therefor [e.g., chain saw chain]
- Y10T83/913—With means permitting removal of cutter element
Definitions
- T-slots as a device for securing a cutter tip to the base plate of a chain saw.
- One such proposal in this vein is featured in the United States Cox Patent 2,852,048.
- this T-slot structure requires a fairly high degree of precision in manufacture, along with its attendant expense, and involves a bulky cutter tip extending the entire longitudinal length of the link base plate.
- the overall cutter link presented through this invention includes a flat, planar base plate and a generally blocklike, kerf-cutting, carbide tip mounted on the base plate.
- the base plate includes apertured wall means operable to pivotally connect the base plate to adjacent cutter links in a chain saw.
- Flat, planar, parallel side walls extend from the apertured wall means to the edge of the base plate which faces a kerf-engaging edge of the cutter link.
- a mounting surface means extends transversely between the parallel side walls, extends generally longitudinally of the cutting direction of the cutter link, and faces generally toward the kerf-engaging edge of? the cutter link.
- a mounting abutment means extends from the mounting surface means generally away from the kerf-engaging edge and faces at least partially away therefrom.
- the carbide cutting tip includes cutting surface means which extends generally transversely of the cutting direction.
- a slot means formed in the tip extends generally longitudinally of the cutting direction and is displaced longitudinally rear'wardly of the cutting surface means with reference to the cutting direction.
- a supporting surface means defines a base of this slot means and faces the mounting surface means of the base plate.
- a locking abutment means defines an end of the slot means with the mounting abutment means being interposed between the locking abutment means and the kerf-engaging edge of the cutter link. Brazing means bond. the carbide tip to the base plate.
- FIGURE 1 illustrates, in enlarged form, a portion of a chain saw cutter link assembly illustrating one carbide tip of the present invention mounted on a cutter lin base plate.
- FIGURE 2 provides a top plan view of the FIGURE 1 assembly.
- FIGURE 3 provides an elevational sectional view of the FIGURE 1 assembly as viewed along the section line 3-3 with a portion of the carbide tip being partially sectioned to reveal a carbide tip stabilizing slot which cooperates with the base plate to effectively support a carbide tip against lateral displacement tendencies;
- FIGURE 4 schematically illustrates the cutter link of the FIGURE 1 assembly during 'a kerf-cutting operation, with the carbide tip partially sectioned in elevation, and illustrating the manner in which the mechanical interconnection between the tip and base plate effectively resists cutter-induced forces tending to separate the tip from the base plate.
- MAJOR COMPONENTS OF CUTTER CHAIN ASSEMBLY Cutter chain assembly 1 shown in FIGURE 1, includes a series of pivotally interconnected, planar, sheet metal, link components. These components comprise side links 2, cutter links'3 and spacer links 4. Each link is provided with a pair of transversely extending apertures, spaced longitudinally of the cutting direction D (direction D is schematically shown in FIGURE 1). These apertures, such as the aperture 5 at the leading end of cutter link 3, receive a pivot pin or rivet 6 which pivotally interconnects the various link components of the assembly as shown.
- the assembly 1 will include a series of cutter links spaced longitudinally of the assembly I, mounted on alternate sides of the assembly 1 so as to provide, so-called, left and right-handed cutter link orientation.
- each left and right-handed cutter link if placed in side-by-side relationship, would bear a substantially mirror image relationship to each other.
- MOUNTING PLATE Cutter link 4 comprises a flat, planar, sheet steel base plate 7.
- Sheet metal base plate 7 is provided with apertured wall portions 8 and 9, with each such portion being operable to receive a pivot pin 6.
- Apertured wall portion 8 serves to interconnect base plate 7 with a spacer link 4 and a side link 2.
- Apertured wall portion 9 serves to interconnect the trailing end of base plate 7 with side link 2 and another spacer link 4.
- Base plate 7 includes a pair of flat, planar, parallel, side walls 10 and 11 extending throughout the sides of the base plate from the apertured portions to the upper compositely configured edge 12. This edge 12. faces the kerf-engaging extremity or edge 13 of the cutter link.
- sheet metal base plate 7 in its lower portion, when the link is viewed in elevation, as shown in FIGURE 1, conforms substantially to the configuration of the lower half of side link 2.
- the configuration of the upper half of base plate 7 is somewhat larger than the side link 2 and is illustrated in FIG- URE 1.
- the upper half of base plate 7 provides a conventional cutting depth gauge 14 and a carbide-tip mounting portion 15.
- Mounting portion 15, as shown in FIGURES 1, 3 and 4 includes a flat mounting surface 16 extending transversely between side walls 10 and 11. Mounting surface 16 also extend-s generally longitudinally of the cutting direction D and faces generally toward the kerf-engaging edge 13.
- a generally fiat, planar, mounting abutment 17 extends from the mounting surface 16 generally away from the kerf-engaging edge 13.
- Mounting abutment surface 17 is inclined rearwardly relative to direction D and faces generally away from the kerf-engaging edge 13.
- this kerf-engaging edge is the upper portion of the link shown in FIGURE 1 (or the lower portion shown in FIGURE 4) which engages the base of a kerf being cut.
- the base plate 7 also includes a generally, flat, planar, mounting shoulder surface 18 which extends from the mounting surface 16 generally toward the kerf-engaging edge 13. As shown in FIGURE 1, mounting shoulder surface 18 is inclined somewhat forwardly in the cutting direction D and faces generally toward the depth gauge 14.
- CARBIDE TIP Cutter link 3 includes a cutting tip 19 fabricated from wear-resistant material such as tungsten carbide.
- Cutting tip 19 is brazed in place on mounting portion 15 of base plate 7 by conventional, industrial brazing techniques.
- Carbide tip 19 is generally block-like in configuration and includes a concave or partially cylindrical cutting surface 20 extending generally transversely of the cutting direction, and inclined somewhat rearwardly thereof.
- a slot 21 extends longitudinally of the underside of the block 19. Slot 21 extends from, and intersects, the rear face 22 of the block 19 and terminates at a forward end 23. End 23 is spaced somewhat rearwardly of the cutting surface 20.
- lot 21 is defined by parallel side walls 24 and 25 which are disposed in brazed and surface-conforming engagement with the side walls 10 and 11 of the base plate 7.
- Slot 21 also includes a flat, supporting surface 26 extending perpendicular of the slot side walls 24 and 25. Supporting surface 26 thus defines a base of the slot 21. Surface 26 faces the base plate mounting surface 16 and is disposed in substantial conforming and brazed engagement with the mounting surface 16.
- the leading slot end 23, with reference to the cutting direction D, is defined by a flat planar surface 27 which extends perpendicular to the slot side walls 24 and 25.
- This surface 27 provides a locking abutment, with the mounting abutment 17 interposed between the locking abutment 27 and the kerf-engaging edge 13 of the cutter link 3.
- surfaces 17 and 27 are contiguous and disposed in surface-conforming, brazed engagement.
- slot 21 which intersects the lower wall 28 of block 19, when the block is viewed as shown in FIGURES 1 and 3, is longitudinally displaced from a generally wedge-shaped residual mass of carbide material 29.
- This wedge-shaped mass of carbide material 29 which converges generally rearwardly of the cutting surface 20 with reference to the cutting direction D, is defined by a portion of the block base face 28 merging with the locking abutment surface 27,
- This mass 29 provides a hook-like structure longitudinally aligned with the cutting face 20 and with the hooking surface means facing generally rearwardly of the cutting direction.
- a stabilizing slot 30 extends generally transversely of the longitudinally extending slot 21 in the carbide block or tip 19.
- Stabilizing slot 30 intersects and extends upwardly from the slot 21, when the block 19 is viewed as shown in FIG- URE 1. This slot 30 thus extends generally from the slot 21 toward the kerf-engaging edge 13. Slot 30 intersects rear wall 22 of the block 19 and also intersects the upper wall 31 of the carbide tip 19.
- Slot 30 is defined by parallel side walls defining coplanar continuations of side walls 24 and 25.
- the sides of slot 30 are defined by side wall 24a, defining a planar continuation of side wall 24, and side wall 25a defining a planar continuation of side wall 25.
- Side wall 24a and side wall 24 coact to provide a generally L-shaped side wall of planar configuration disposed in brazed and conforming engagement with one side of the mounting plate 7 adjacent the base plate surfaces 16 and 18, Side walls 25a and 25 coact in a similar fashion with the other side of plate 7.
- Slot 30 also includes a fiat base wall 32 extending perpendicular to and transversely of the slot side walls 24a and 25a.
- Slot base wall 32 extends generally upwardly from slot base wall 26 to intersect the block top surface 5, 31, Slot base 32, as shown in FIGURE 1, is inclined upwardly from the surface 26 and generally forwardly with reference to the cutting direction D. s
- 'slot surfaces 26 and 32 cooperate to define a generally wedge-shaped carbide body portion 33,
- the remaining surfaces of the block 19 comprise akerf side cutting, i.e. facing, surface 35 and an arcuate juncture or edge 36 tangentially interconnecting the kerf'side facing surface 35 and the kerf base facing surface 31.
- the planar surface 31 is inclined somewhat away from the surface 35, generally downwardlytoward the apertured portions 8 and 9 of the base plate 7.
- surface 35 in extending down from the curved, partially cylindrical junction 36, is inclined generally inwardly toward the base plate 7.
- the. carbide tip On the kerf side facing side of the base plate 7, the. carbide tip may be extended downwardly. This downward extension may be defined by a downwardly extending side wall portion 25b and an undersurface 38 extending generally parallel to but displaced beneath the major block underface 28.
- a bevel surface 39 interconnects surfaces 38 and 35 and extends generally longitudinally of the block 19.
- Block 19 also includes an inner, flat side wall surface 40 which interconnects and extends between block surfaces 28 and 31. 7
- the carbide block 19 includes a generally L-shaped cutting edge comprising the linear inter-section of surfaces 20 and 31, the arcuate intersection of surfaces 20 and 36, and the concave intersection of surfaces 20 and 35.
- the intersection of surfaces 20 and 31 performs a kerf-base cutting function.
- the intersection of surfaces 20 and 3-6 performs a kerf-cbrner cutting function.
- the intersection of surfaces 20 and 35 performs a kerf-side cutting function.
- FIGURE 4 schematically illustrates the manner in which the base plate 7 and carbide tip 19 cooperate to cut a kerf portion.
- the wedge-shaped block body portion 29, lockingly engagedwith plate surface 17, is able to effectively function as a carbide tip locking mechanism, in spite of the intensive forces tending to separate this Wedge zone 29 from the remainder of the carbide block 19.
- the normally brittle character of tungsten carbide could be expected to lead oneaway from the concept of using such a carbide securing portion, connected by a relatively small neck zone to the remainder of the carbide tip body, particularly where this neck zone will be subjected to vari ous and considerable forces.
- abutment shoulder 17 tends to compressively engage the wedge-shaped carbide mass 29. It is believed that this compression tendency, afforded by the abutment 17, may strengthen the hooklike. portion of the block 19 so as to increase the internal strength of the block and thus increases: the strength of the hook structure.
- p v 7 It is also believed that the provision of multiple,longitudinally and laterally displaced, compression producing abutment means, coacting between the base plate and cutting tip, tend to. distribute compressive forces acting through the carbide tip, thereby improving its overall strength.
- Lateral stability of the block 19 is uniquely improved by transversely extending the side walls 24 and 25 of the longitudinal slot 21 so as to yield L-shaped slot side walls in conformin engagement with generally L-shaped peripheral portions of the base plate 7.
- This L-shaped side wall configuration tends to promote multidirectional, carbide tip stability.
- slot and wedge, carbide tip securing arrangement eifectively minimizes the bulk of the carbide tip and the areal extent to the brazed surfaces interconnecting the tip and the associated base plate.
- a cutter link for use in a chain saw comprising:
- a cutter link for use in a chain saw said cutter link comprising:
- a fiat, planar base plate said base plate including apertured wall means operable to pivotally connect said base plate to adjacent cutter links in a chain saw, flat, planar, parallel side walls extending from said apertured wall means to the edge of said base plate facing a kerf-engaging edge of said cutter link, mounting surface means extending transversely between said parallel side walls, extending generally longitudinally of the cutting direction of said cutter link, and facing generally toward the kerf-engaging edge of said cutter link, mounting abutment means extending from said mounting surface means generally away from said kerf-engaging edge and facing at least partially away therefrom; and a carbide, kerf cutting tip mounted on said base plate and including cutting surface means extending generally transversely of said cutting direction, slot means extending generally longitudinally of said cutting direction and displaced longitudinally rearwardly of said cutting surface means with reference to said cutting direction, supporting surface means defining a base of said slot means and facing said mounting surface means of said base plate, and locking abutment means defining an end of said slot means,
- a cutter link as described in claim 2 wherein said cutting surface means of said carbide tip is concave, with the axis of curvature thereof extending transversely of said cutting direction; wherein said base plate includes a mounting shoulder extending from said mounting surface generally toward said kerf-engaging edge of said cutter link and inclined forwardly in said cutting direction; and wherein said carbide tip includes a locking shoulder extending from said slot means generally toward said kerf-engaging edge of said cutter link, with said mounting shoulder being interposed between said locking shoulder and said kerf-engaging edge.
- said locking shoulder defining a base of said stabilizing slot means
- said longitudinally extending slot means and said stabilizing slot means including parallel side walls disposed on opposite sides of said base plate, with each of said side walls having a generally L-shaped, planar configuration extending along an edge of said mounting shoulder of said base plate and an edge of said mounting surface means of said base plate.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US70193668A | 1968-01-31 | 1968-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3477480A true US3477480A (en) | 1969-11-11 |
Family
ID=24819276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US701936A Expired - Lifetime US3477480A (en) | 1968-01-31 | 1968-01-31 | Stabilized cutting tip for chain saw cutter link |
Country Status (3)
Country | Link |
---|---|
US (1) | US3477480A (en) |
JP (1) | JPS495346Y1 (en) |
DE (1) | DE1813247A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004113035A2 (en) * | 2003-06-20 | 2004-12-29 | William Waytenick | Wood cutting saw chain and replaceable cutting members |
US20080034938A1 (en) * | 2006-08-10 | 2008-02-14 | Andreas Stihl Ag & Co. Kg. | Connecting link for a saw chain |
US20090107317A1 (en) * | 2007-10-24 | 2009-04-30 | Andreas Stihl Ag & Co. Kg. | Cutting link for a saw chain |
US20110120280A1 (en) * | 2006-01-23 | 2011-05-26 | Szymanski David A | Anti-kickback insertable chain and replaceable teeth therefor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US279781A (en) * | 1883-06-19 | And wil | ||
US2664120A (en) * | 1948-09-13 | 1953-12-29 | C & H Dev Company | Saw chain |
US2755828A (en) * | 1951-08-03 | 1956-07-24 | Edwin T Dunnington | Chain saw |
US2994350A (en) * | 1958-02-13 | 1961-08-01 | Lundberg Gunnar Karl Gosta | Saw with insert teeth |
-
1968
- 1968-01-31 US US701936A patent/US3477480A/en not_active Expired - Lifetime
- 1968-12-06 DE DE19681813247 patent/DE1813247A1/en active Pending
-
1972
- 1972-12-30 JP JP1973005221U patent/JPS495346Y1/ja not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US279781A (en) * | 1883-06-19 | And wil | ||
US2664120A (en) * | 1948-09-13 | 1953-12-29 | C & H Dev Company | Saw chain |
US2755828A (en) * | 1951-08-03 | 1956-07-24 | Edwin T Dunnington | Chain saw |
US2994350A (en) * | 1958-02-13 | 1961-08-01 | Lundberg Gunnar Karl Gosta | Saw with insert teeth |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004113035A2 (en) * | 2003-06-20 | 2004-12-29 | William Waytenick | Wood cutting saw chain and replaceable cutting members |
WO2004113035A3 (en) * | 2003-06-20 | 2005-04-28 | William Waytenick | Wood cutting saw chain and replaceable cutting members |
US20110120280A1 (en) * | 2006-01-23 | 2011-05-26 | Szymanski David A | Anti-kickback insertable chain and replaceable teeth therefor |
US20080034938A1 (en) * | 2006-08-10 | 2008-02-14 | Andreas Stihl Ag & Co. Kg. | Connecting link for a saw chain |
US20090107317A1 (en) * | 2007-10-24 | 2009-04-30 | Andreas Stihl Ag & Co. Kg. | Cutting link for a saw chain |
US8028610B2 (en) * | 2007-10-24 | 2011-10-04 | Andreas Stihl Ag & Co. Kg | Cutting link for a saw chain |
Also Published As
Publication number | Publication date |
---|---|
JPS495346Y1 (en) | 1974-02-07 |
DE1813247A1 (en) | 1969-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MCCULLOCH CORPORATION A MD CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BLACK & DECKER INC., A DE CORP.;REEL/FRAME:004134/0336 Effective date: 19830505 |
|
AS | Assignment |
Owner name: CITICORP INDUSTRIAL CREDIT, INC., NEW YORK Free format text: MORTGAGE;ASSIGNORS:MC CULLOCH CORPORATION;MC CULLOCH OVERSEAS N.V.;REEL/FRAME:004158/0190 Effective date: 19830331 Owner name: CITICORP INDUSTRIAL CREDIT, INC., 450 MAMARONECK A Free format text: MORTGAGE;ASSIGNORS:MC CULLOCH CORPORATION;MC CULLOCH OVERSEAS N.V.;REEL/FRAME:004158/0190 Effective date: 19830331 |
|
AS | Assignment |
Owner name: MCCULLOCH CORPORATION, A CORP. OF MD. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP NORTH AMERICA, INC., FORMERLY KNOWN AS CITICORP INDUSTRIAL CREDIT, INC.;REEL/FRAME:005365/0004 Effective date: 19900530 |